Handle for rock drills



March 21, 1933. E. 4F. TERRY HANDLE FOR ROCK DRILLS Filed July 30 1931 2 Sheets-Sheet l Edu/f #dI-117611:' BY

H55 A TTORNEYv March 2l, 1933. E. F. TERRY 1,902,530

HANDLE FOR ROCK DRILLs r Filed July so, 1931 2 sheets-sheet 2 IN V EN TOR.

HIS A TTORNEY Patented Mar. 21, 1.933

UNITED STATES.' PATE ofFEIcE EDWARD E. TERRY, or PEILL'IESBURG, INEW JERSEY, ASSIGNOR 'To INGERsOLL-RAND COMPANY, E JERSEY oITY, NEW JERSEY, A coEroEA'rIoiv or NEW JERSEY HANDLE Eon 'application mea July 3o,

This invention relates to rock drills, but more particularly to a handle for rock drills of thedrifter type which, when functioning in that capacity, are generally guided and Y supported in the correct operative position with respect to the work by' alcradle or similar device.

In drills of the drifter type the cylinder is equipped with lateral guide ribs which 1,0 are adapted'to slidey in guideways 1n the cradle, and the cradle is equipped with a feeding device, such as a screw, which is suitably held against longitudinal movement with respect to the cradle and 1s threadedly connected to the' rock drill so that, uponrotation` of the screw, the rock drill may be advanced or retracted longitudinallyv of the cradle. l

rIvheV present invention .is more particularly, though not exclusively, intended for use as a means for manually supporting and guiding light weight drifters of which the weight is such that the drifter lmay be conveniently manipulated by one attendant. The objects ofthe invention accordingly are to render a rock drill ofthe drifter type `readily capable for use as a hand held drill, to prevent the transmission of shock and vibrations from the drill to the operator, and to enable the handle to be readily attached to andV removed from the drill.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings accompanyingthis:speci-` cation and forming a part thereof and in which similar reference characters refer to Similar parts,

Figure l is an elevation partly in section of a handle attached to a rock drill to illustrate a practical application thereof,

Figure 2is a side elevation of the handle and the rock drill, and

Figures 3 and 4 are transverse views taken through Figure l on the lines 3 3 and 4-4 looking in the direction indicated by the arrows.

Referring more particularly to the drawings, A designates generally a rock drill comprising a cylinder B and front and back' heads C and D respectively. A front cylnoci; DEILLS 1931. Serial No. 553,939.

inder extension E is interposed between the cylinder and the front head C land is clamped in assembled relationship. with re spect to the cylinder, as are lthe heads C and D, by the usual side rods F .which extend longitudinally of the drill and on opposite sides thereof. The rear. ends of the side rods F are threaded for the accommodation of nuts G whereby the casing elements of the drill` may be securely clamped together.

On one side of the cylinder B are the guide ribs H which may extend from one extremity of the cylinder to theother, as is customary, for engagement with the guideways of a cradle (not shown)v employed as a mountingfforthe drill.

In accordance with the practice of the invention a'casing part, as for instance the front cylinder extension E, is providedwith a pair of lateral lugs J having recesses K in the rear sides thereof. t At the rear end of the drill and seatedV uponglugs L of the'back head D Ythrough which the sideV rods F extend is.y seated a plate() having apertures P to receive the side rods F and said plate' is securely clamped ,to the back head D or,

more specifically, to the" lugs L by the ynuts .G of the side rods. In the frontend of the l plate O are recesses Q which are coaxial with the recesses Kin the lugs J.

Disposed in thev recesses K and Q, are the ends of rods R which are of uniform diame ter throughout and seat with their ends against yieldable buffers S, as for instance rubber, disposed in the bottom of the recesses.

The handle whereby the rock drill may be manipulated and which is generally designated-byA T comprises a grip portion consisting of outer grip members U and V rand an Vintermediate lgrip member or spacer W. The membersU, V and-W are'each provided withi central apertures X for theaccommodation of a bolt Y whereby the'v grip mem- `bers are held; in axial relationship andare clamped together.

VIn the assembled position of the handle the: grip members` occupy `a position above the rock drill. AV and clamped between the Aendsof themember W and the'adj acent ends ot the grip members U and V are legs Z which terminate at their lower ends in bosses ZJ having apertures c therein to receive the rods R whereon the said bosses are adapted to slide.

The bosses b may be of in order to assure ample bearingsuriace between the said bosses and the rods R. rlhe frontand' rear'ends oi the bosses' b constitute, inthe present instance,` respectively for springs f and g. K springs are interposed between the seats'n/ andthe lugs J against which they seat with their front ends, while the springs g are interposed between the seats e and the plate O which rserves as seats for the rear ends o'l the springs g. y Y l.

In addition to the bosses b the handle may be providedwithmeans intended to maintain the legs Z in approximate alignment with the rods It.. The means illustrated for this purpose comprises projections z/on the opposite ends of the plate Orwhich extend into longitudinal grooves j on the inner surfaces of the legs Z. In order to assure maximum rigidity betweenthe bosses b,xsaid bosses are connected by a bridge or plate k which may be formed integrally therewith.

In practice the handle. may be readily attached to the rock drill by rst placing the rodsVv It in the aperture c of the. bosses. The lower ends of the rods may then. be seated in the recesses K and the plate `O be` disposed on the side rodsF and be clamped against the lugs L of the back head by the nuts G, it being .of course understood that the springs f and g are firstrplaced in position on the rods before entering the rodsin the recesses.

By tightening the nuts Gr yto clamp the casing elements of the roch drill securely together, as well as to clamp the plate vO in position, the rubber buers will be compressed and brought to bear iirmly against the ends of the rods. During the subsequent operation of the tool and during which time the'handle T will of course constantly shift its position relativelylto the rods R, the

substantial length rods It will be held immovable bythe buiiers v S and will therefore not be subjected to the undue wear which would otherwise result were they capable of some degree of movement relatively to. the elements wherein they are seated.

In the operation of the device, any jars and shocks resulting'from the reciprocations ofthe percussive element of the rock drill or from other causeswillbe absorbed by seats CZ and e TheY into one df thel hand hel-dy typeand `without l necessitating the complete disorganization =of the drill. vfact that it is necessary only to remove the This ismade possible by the nutsGr. L'Ihel plate O and the elements con- 1 stituting the handle structure may then be placed on the drill or removed, whereupon the nuts G may again be threaded on the side rodsrto clamp the casing elements ofl the drill together.' f

I claim:` Y

1. In combination, a rock drill having pairs oropposed recesses spaced along the length thereof, a handle, legs on the handle having apertures therein, rods seated `with their .ends in the recesses and extending through the apertures, springs to oppose the movement ot' the legs relatively to the rods,

Vand yieldable means in therecesses to serve as abutments for the .endsoi the rods.

2. In combination, a rockdrill, means on an intermediate portion of the rock drill having a pair of rearwardly opening recesses` therein, means on the rear end of the rock drill having a pair of forwardly opening recesses, rods extending longitudinally ol" the roclrdrill and being seated withtheir ends in the recesses, yieldable buifers in the Vrecesses to serve as abutments for the rods,

a handle, legs on the handle and being slidable on the rods, and springs interposed between the said means and the legs to cushion the movement of the handle longitudinally of the rods.

3. Incombination, a rock drill, .means spaced along the length thereof and havingk Vpairs of opposed recesses, a handle, legs on the handlek having apertures therein, rods seated with their ends lin the recesses and extending through the apertures, rubber buiers in the recesses for the ends of the rods, springs acting against the said means and the legs to cushionthe movement of the handle longitudinally of the rods, and means to connect the legs adjacent the apertures.

kIn testimony whereof I have signed this specifioation.`

EDWARD F. TERRY.'

the springs f and g instead of being trans-V mitted to the grip portions of the handle.

The present invention has been found to be extremely eilicient and one of its chief advantages resides in the fact that it may be quickly applied to a preassembled drill of the drifter typel for converting such drill lee llO 

